“When you’re filming a dance scene, what they don’t tell you is there’s no music. None,” Hammer explained of his big moment in the film. “Like, you get this [snaps his fingers] for like three seconds, and then they cut the click track.”

To make things worse, “I don’t really have a go-to sober dance move,” he added. “So this was all things I had to learn on the fly.” The end result was “a lot of flailing, a lot of jumping.”

Corden wanted to see proof, so both Hammer and the late-night host took center stage to recreate the moment with their own makeshift click track. “Now imagine you’ve got a focus-puller who’s watching you go, and it’s 4 in the morning and we’ve been doing this since 8 p.m. [and he says] ‘Can you f–king finish your dance moves?'” Hammer said.

You can watch the fruits of Hammer’s labor in Call Me By Your Name, now playing in select theaters.